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Old 10-04-2012, 11:44 PM   #41
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Quote:
Originally Posted by big2bird View Post
Just bond the lift to the pole with a jumper cable. Bond= zero potential difference.
After you leave...then what?
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Old 10-04-2012, 11:45 PM   #42
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Originally Posted by RIVETER View Post
After you leave...then what?
Take off the jumper cable?
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Old 10-04-2012, 11:46 PM   #43
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Take off the jumper cable?
neg first..postive sec then reverse just like a car
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Old 10-04-2012, 11:50 PM   #44
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what are those lines above the lights, are they hydro wires?
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Old 10-04-2012, 11:51 PM   #45
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what are those lines above the lights, are they hydro wires?
130kV Transmission lines
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Old 10-04-2012, 11:54 PM   #46
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neg first..postive sec then reverse just like a car
Actually that's backwards. When you jump a car battery, always pos first. When you do negatives last, it won't arc to the chassis.

I hope you realise I said use them to jump from the chasis to chassis, correct?

When you do HV work, you always shut it off, allow x/time/volt for bleed off, then ground it all together in case some knucklehead turns it on somewhere.
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Old 10-04-2012, 11:54 PM   #47
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what are those lines above the lights, are they hydro wires?
What is a hydro wire?
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Old 10-04-2012, 11:56 PM   #48
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What is a hydro wire?
Trasnsmission line. They have alot of hydroelectric generated power out east.
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Old 10-05-2012, 12:11 AM   #49
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Your so in southern Ohio. I should try to get a car number off that train and see whereabouts it was today.

Closer inspect of that photo looks like its not our signaling equip.

Either CSX or BN signaling sytem I know CN use differnt one.

Merci,
Marc
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Old 10-05-2012, 12:23 AM   #50
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sorry, Transmission lines

Quote:
Originally Posted by big2bird View Post
What is a hydro wire?
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Old 10-05-2012, 12:41 AM   #51
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Limits of Approach
Voltage phase to phase
Metres
Feet
Over 750 V to 75 kV
3
10
Over 75 kV to 250 kV
4.5
15
Over 250 kV to 550 kV
6
20

How close are you?
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Old 10-05-2012, 01:04 AM   #52
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Wow. That wasn't fun at all... It didn't sink in til they were coming down with burn marks on arms then it set it. Actually, they were laughing about it all day. Everyone is safe and home now, but it was no joke at all. Learned a big lesson today and probably won't even work around that stuff anymore or just prep everything up correctly with proper ppe next time.
and you are OK with that?... all's well that ends well?...

"It didn't sink in til they were coming down with burn marks on arms"

Thank whomever it is that you thank that they are not in cold storage in the morgue right now.

Think about it. Really think about it.

Yeah, big joke all right...
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Old 10-05-2012, 01:10 AM   #53
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We do alot of swith yards, we had a guy about five years ago, that was in a hurry and disconected it the wrong way. that was the last thing he ever did. play it safe.
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Old 10-05-2012, 02:45 AM   #54
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transient voltage from high tension lines? possible but unlikely.
It's very possible. I changed irrigation pipes in a field below high tension lines and when we picked the pipe off the ground the current would arc into our belt buckles. We had to drag chains from the pipe cart to keep it grounded so we wouldn't get shocked
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